HZ=1000 ?
Emanuel Strobl
emanuel.strobl at gmx.net
Tue Apr 5 02:09:07 PDT 2005
Am Dienstag, 5. April 2005 01:09 schrieb John Pettitt:
> cpghost at cordula.ws wrote:
> >Interestingly, HZ=100 has remained constant for decades (!), despite
> >CPUs getting faster all the time. This is an excellent value for most
> >typical usage patterns. Cranking it up should only be required for
> >special cases. Anyway, the HZ knob is there. Experiment with it until
> >you get optimal performance.
>
> In the dim and distant past (like 1983) some systems used HZ=50 or HZ=60
> depending on where in the world they were. I used an MP/M based box
> that took it's clock tick from the power line (no good RTC hardware
Hmm, I've seen onboard RTCs which surely were less acurate than a
power-line-driven oscillator was ;) Some RTCs are really bad. But at least
here in germany power line frequency is astonishing acurate. We also have a
broadcast station which generates it's 50Hz vertical refresh rate from a
dedicated caesium clock. Of course this tv station is paid by the peoples....
Sorry, a bit OT, but I'm really impressed how constant power line frequency
is.
-Harry
> available but the power company keeps pretty good time).
>
> John
> _______________________________________________
> freebsd-questions at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> To unsubscribe, send any mail to
> "freebsd-questions-unsubscribe at freebsd.org"
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 187 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-questions/attachments/20050405/8ba97ca8/attachment.bin
More information about the freebsd-questions
mailing list